Any ideas?· Page 3 · AditNow Community

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lozz
50.2% (Neutral)
Newbie

12 years ago

#41

"droid" wrote:
Anything to do with Graham Hancock will be utter self-deluding bollocks.

I don't know him from Adam, the site was a result of a google search on the said holes.
A lot of the comments on that site did come across as somewhat of the Ike camp.

Lozz.

lozz
50.2% (Neutral)
Newbie

12 years ago

#42

Someone mentioned a four sided bit a while back, a good possibility maybe? as in the picture the axis of the intermediate groove between every other grooves axis looks very close to 90 degrees, just a thought.

Lozz.

Roy Morton
50.2% (Neutral)
Newbie Topic Starter

12 years ago

#43

The Flynt Quarry holes and the Norwegian one are all very similar the one in my picture.

In the photos from Norway, the ground looks very disordered and there are buildings on the top of the excavation. Perhaps it was a ground stability drilling programme in the past.
The alien thing makes me laugh though. :lol:

"You Chinese think of everything!"
"But I''m not Chinese!"
"Then you must have forgotten something!"

lozz
50.2% (Neutral)
Newbie

12 years ago

#44

Yes, the one in your picture is very similar to the one at that quarry.
What's striking is the equal angles between the grooves from the central axis, it can probably be assumed that the rotational rate of the bit would be fairly constant and I think it would be safe to say that the bit is wandering, question is is it wandering from the axis in a random fashion or is it wandering at a fixed rate ie: oscillating either side of the axis.
The whole thing seems to suggest the latter?

Lozz.

Morlock
50.2% (Neutral)
Newbie

12 years ago

#45

"lozz" wrote:
question is is it wandering from the axis in a random fashion or is it wandering at a fixed rate ie: oscillating either side of the axis.
The whole thing seems to suggest the latter?

Lozz.

Looking at the mechanics of a Lobed oil pump the drill axis will follow a precise circular path but will only cut 4/5ths of the hole per revolution?
Does not look at all random.

🔗Personal-Album-1695-Image-86360[linkphoto]Personal-Album-1695-Image-86360[/linkphoto][/link]

Edit: Looking at this again it's the reverse set-up to an oil pump where the rotor drives the 5 lobed ring, so perhaps 1:1 ratio per rev.
Head now hurts. 😉

staffordshirechina
50.2% (Neutral)
Newbie

12 years ago

#46

Well done that man!
I have been looking for an oil pump photo myself.
Another factor that I seem to remember makes the bit start like that is a slight bend in the drill rod. It means that one cutting face is hard down and the other three are free to swing and the rod steps around until it gets a bite, then may have already started a five lobe hole.

Morlock
50.2% (Neutral)
Newbie

12 years ago

#47

"staffordshirechina" wrote:
Another factor that I seem to remember makes the bit start like that is a slight bend in the drill rod. It means that one cutting face is hard down and the other three are free to swing and the rod steps around until it gets a bite, then may have already started a five lobe hole.

A bent drill rod sounds about right, only other cause might be varying wear on cutting edges giving a similar effect. Bent rod seems most likely reason though.

lozz
50.2% (Neutral)
Newbie

12 years ago

#48

The more I look at the picture the more convinced I am that it was made with a single chisel bit.

5 equally spaced lobes, is it coincidence or is there a governing factor?

Lozz.

Morlock
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Newbie

12 years ago

#49

"lozz" wrote:
The more I look at the picture the more convinced I am that it was made with a single chisel bit.

5 equally spaced lobes, is it coincidence or is there a governing factor?

Lozz.

The fact that 3 & 5 lobed holes are 'constant diameter' figures has some bearing as the drill has to perform a complete revolution as if in a 'round' hole so suspect the answer is in this lot. Any mathematicians about?

http://en.wikipedia.org/wiki/Curve_of_constant_width

lozz
50.2% (Neutral)
Newbie

12 years ago

#50

Just been reading an extract from google books on rock drills, it says that a typical blows per minute figure is 2,000 blows per minute, the indexed rotational advance by the riffling bar mechanism is typically 20 degrees and thus the RPM is 100.

By coincidence the RPM divided by the indexed advance angle happens to equal 5...any thoughts?

Lozz.

Morlock
50.2% (Neutral)
Newbie

12 years ago

#51

I've loads of idea's based on your latest info, nothing that would stand up without a lot of field testing though. 😉

Roy Morton
50.2% (Neutral)
Newbie Topic Starter

12 years ago

#52

I'm of the opinion, like Lozz, that it's a chisel ended bit that could be responsible. There is however evidence to show that a hex drill rod can produce a similar pattern.
I would like to examine examples of each for comparison.
BTW the way Lozz, the maths seems to make sense; not mere coincidence I believe.

"You Chinese think of everything!"
"But I''m not Chinese!"
"Then you must have forgotten something!"

stuey
50.2% (Neutral)
Newbie

12 years ago

#53

Lozz, I think you are on the money and I think the oil pump diagram sums it up perfectly.

Dolcoathguy
50.2% (Neutral)
Newbie

12 years ago

#54

Ran it past Ian, he reckons it maybe have been deliberately drilled to create a hole where a hook or loop could have been wedged. If that is the case, then where there are already hooks at this site then similar structures might be seen (or not!).

Is it safe to come out of the bunker yet?

lozz
50.2% (Neutral)
Newbie

12 years ago

#55

Forward and reverse rotary whirl...

[youtube]-8sMdTEQgIE[/youtube]

(Edit: If the link don't work, go to utube and enter rotary whirl)

Lozz.

[tweak]Linked fixed - for some reason the forum s'ware doesn't like https[/tweak]

Roy Morton
50.2% (Neutral)
Newbie Topic Starter

12 years ago

#56

Going back to the oil pump example, it reminded me of a similar thing from the past, the Spirograph. With some of the smaller simpler toothed wheels, star shapes with varying numbers of points could be produced. The path that the pen described seemed at times, to go against the rotation of the toothed wheel, much in the way that a chisel bit would skip around with alternate sides scribing short arcs.
All in all this has proved to be a really informative thread, with some sterling contributions. :thumbsup:

"You Chinese think of everything!"
"But I''m not Chinese!"
"Then you must have forgotten something!"

crl50
50.2% (Neutral)
Newbie

12 years ago

#57

This may help explain some things.

http://demonstrations.wolfram.com/DrillingAPentagonalHole/

Here's some Maths.

http://www.engin.umich.edu/research/wumrc/sm_wu/papers/AnAnalysisoftheDrillWanderingMotion.pdf

The hexagon metal cutting tool that was mentioned early in the thread in action.

lozz
50.2% (Neutral)
Newbie

12 years ago

#58

Epicycloid?

Lozz.